EP2088106B1 - Coiling machine for winding a web of material - Google Patents

Description

The invention relates to a winding device for Aufwi wraps a web, in particular paper, cardboard or tissue web on a winding tube to form a winding roll with at least one arranged on a central support roller winding station, each comprising a support and / or storage device for the winding roll with both sides the winding tube arranged supporting elements, which are transversely displaceable to the material web running direction and have rotatably mounted guide heads.

Winding machines are known in different versions from the prior art. In this case, partial material webs produced in a web of material are wound up in support roll winding devices, preferably on in each case one winding tube to form a respective winding roll, which is supported on a drivable support roll to form a winding nip. The winding tube is guided on a support and guide device, comprising two both sides of the winding tube arranged and retractable into this, rotatably mounted guide or clamping heads. Such machines can be arranged in online or offline construction to a machine for the production of fibrous webs.

The DE 41 02 374 A1 discloses a winding apparatus according to the preamble of claim 1 in the form of a back-up roll reeling apparatus which provides single reel-up stations arranged around a central back-up roll to form reels of longitudinally-cut webs. The winding stations each comprise a support and / or storage device for the winding roll with both sides of the winding tube arranged support elements, which are transversely displaceable to the web travel direction and have rotatably mounted guide heads.

From the publication WO 98/52858 A1 an embodiment of a winding machine is previously known, comprising a Anpresstrommel or roller, against which the winding roller and thus forms a winding nip. The winding is wound on a fixed core, the drum, and led away according to the diameter increase with pressure controlled by the Anpresstrommel. When changing the material web on a new spool, a new spool is applied to the Anpresstrommel above the first winding nip and forced by releasing the web tension or a tape wrap for the web to wind up on the new spool. The finished wound spool may be transported to a slitter while the newly formed spool is lowered to the preferably horizontal main spool position. In this way, although an uninterrupted winding of the machine-width material web is theoretically possible, but the Anwickelvorgang designed after a reel change often not ideal, which is reflected in an extension of the changeover times.

To realize an improved roll change, it is therefore according to the document DE 20 2006 017 029 U1 provided, the individual cores to be provided with a perforation, which can be applied to an at least temporarily besaugbare and perforated expansion winding shaft, preferably pushed, that several, preferably all perforations of the winding tube with those of the expansion winding shaft are arranged at least partially overlapping. By this taking place Innenaugaugung the winding tube is achieved that the web starts the web safely taken up and sufficiently fixed, whereby the roll change can be completed process with a significantly reduced change times total process reliability. Furthermore, the rejects during the roll change is reduced and creates a possibility for maintaining known and proven winding concepts with an overall better winding quality. However, the solution described is characterized by a high cost, in particular with regard to the configuration of the winding tube and the expansion waves and their connection to a storage facility.

The invention is therefore based on the object, a Stützwalzenwickelvorrichtung of the aforementioned type such that an improvement of the Anwickelvorgangs is made possible on the sleeve, wherein the solution by a small design and control engineering effort should be characterized.

The solution according to the invention is characterized by the features of claim 1. Advantageous embodiments are given in the subclaims.

The winding device according to the invention for winding a material web, in particular paper, cardboard, or tissue web on a winding tube to form a winding roll with at least one arranged on a central support roller winding station, comprising a storage and / or support means for the winding roll arranged on both sides of the winding tube Support elements and displaceable transverse to the sleeve axis rotatably mounted guide heads is characterized in that the winding tube is perforated and the interior of the winding tube is coupled via at least one of the guide heads with a device for applying a negative pressure, wherein between the winding tube and the guide head at least one sealing device is arranged , To realize a connection, the winding tube is clamped to the guide head.

The solution according to the invention makes it possible to minimize the expense of applying a negative pressure in the region of the circumference of the winding tube for sucking the material web end against the winding tube. This is usually realized by guiding or coupling a suction with the interior via the guide head. The modifications to the winding tube are to low, also the required modifications to the guide head.

According to a particularly advantageous embodiment of the solution according to the invention, the sealing device is arranged in clamping force acting device between the sleeve and the guide head. The clamping force is simultaneously used to form or fix a seal.

Depending on the design of the tension in the radial or axial direction, the sealing device is designed either as a radial or axial seal, comprising in a preferred embodiment as a contacting seal at least in each case a sealing element which can be arranged between the winding tube and the guide head. The sealing element can be designed in various ways, conceivable are sealing rings in the form of O-rings or rings with any desired transverse profile.

In a particularly advantageous embodiment with the least possible modification and also the least possible wear for the sealing surfaces due to slight relative movements, the sealing surfaces are formed by mutually facing sides or surface areas on the winding tube and the guide head, which preferably directed from the end face of the winding tube and one to the front side Surface area of the guide head are formed.

The device for generating a vacuum is preferably arranged only on one side of the winding tube and thus on one of the guide heads, whereby only one guide head is to be modified accordingly. The remaining guide heads on the opposite end faces of the winding tube can be used in a standardized form.

The perforation on the winding tube may be formed in different ways. In the simplest case through openings are provided, which extend through the sleeve casing in the radial direction. The extension is preferably carried out directly perpendicular to the center axis of the winding tube. Designs at an angle to this are also conceivable.

In a particularly advantageous embodiment, more than one such through opening is provided. In this case, a plurality of passage openings can be arranged distributed in the width direction and / or in the circumferential direction to each other. According to a particularly advantageous embodiment and for the realization of a uniform suction effect, the arrangement is preferably carried out symmetrically in the circumferential direction. Other versions are also conceivable.

Bohrungsdurchmesser für die Durchgangsöffnung

zwischen 0,5 bis 2 mm;

Fasendurchmesser

gleich 1,1 bis 3 x Bohrungsdurchmesser; und

Bohrungsfase

zwischen 60 bis 120 Grad.

The flow cross-section in the passage opening can be constant or else designed according to a particularly advantageous embodiment with changing cross-sectional geometry and / or dimensioning. In a particularly advantageous embodiment, the single passage opening is designed with cross-section widened on the outer circumference with respect to the inner circumference. Preferably, this cross section is generated via a chamfer. The chamfer dimensions for the realization of an optimal suction are characterized by the following dimensions:

Bore diameter for the through hole

between 0.5 to 2 mm;

Chamfer

equal to 1.1 to 3 x bore diameter; and

bore chamfer

between 60 to 120 degrees.

The device according to the invention may comprise one or a plurality of winding stations. The winding stations can be arranged in different areas in the peripheral region of the support roller viewed, also can be arranged over the extension of the support roller in the width direction, a plurality of winding stations with offset in the width direction and in the additional circumferential direction to each other, thus at the subdivision of a web simultaneous winding to ensure this.

Figuren 1a und 1 b

verdeutlichen in schematisiert vereinfachter Darstellung anhand zweier Ansichten eine Ausführung einer Wickelvorrichtung in Form einer Stützwalzenwickelvorrichtung;

Figur 2

verdeutlicht anhand einer Detailansicht gemäß Figur 1b die Ausführung eines Führungskopfs mit einer Hülse;

Figur 3

verdeutlicht eine weitere mögliche Anordnung der Einrichtung zur Erzeugung/Beaufschlagung des Innenraums der Wickelhülse mit einem Vakuum; und

Figuren 4a und 4b

verdeutlichen anhand einer Ansicht von oben auf eine Hülse beispielhaft mögliche Ausführungen der Perforierung.

The solution according to the invention is explained below with reference to figures. In it, individuals are shown:

FIGS. 1a and 1b

illustrate in a schematic simplified representation based on two views of an embodiment of a winding device in the form of a support roller winding device;

FIG. 2

illustrated by a detail view according to FIG. 1b the execution of a guide head with a sleeve;

FIG. 3

illustrates another possible arrangement of the means for generating / loading the interior of the winding tube with a vacuum; and

FIGS. 4a and 4b

illustrate by way of a view from above on a sleeve exemplary possible embodiments of the perforation.

The FIGS. 1a and 1b illustrate in schematic highly simplified representation with reference to two views of the structure of a winding device 1 for winding webs M or after a separation of material webs M1, M2, in particular in the form of paper or board webs in the form of a support roller winding device 2. The winding device 1 comprises at least one Back-up roller 3 and at least one winding station 4 formed thereon. The back-up roller 3 is preferably drivable. The drive is realized in a particularly advantageous manner via a center drive. In this case, at least one, preferably also two or more such winding stations 4a, 4b can be provided on a support roller 3. These are in the FIG. 1a exemplified in the view from the right to the winding device 1. For this purpose, a coordinate system is applied to this, wherein the X direction is characterized by the web running direction and at the same time describes the machine direction, while the X direction represents the width direction of the winding stations 4a and 4b and is oriented transversely to the X direction and the Z direction describes the height direction. In the FIG. 1b is a view of the winding station 4a reproduced in a view from the front, in particular the YZ plane of the winding device 1. Before the startup of the support roller 3, the material web M, which is to be wound up, is subdivided by a longitudinal cutting device 5 into at least two, preferably a plurality of material part webs M1, M2. Each of these material partial webs M1, M2 is guided by the support roller 3 to a winding station 4a and 4b, where they are wound into winding rolls 6a and 6b in the form of web rolls around a winding tube 7a or 7b. The two winding stations 4a and 4b are viewed in the circumferential direction of the support roller 3, this viewed at different peripheral regions, but viewed in the width direction of the support roller 3 offset from one another. assigned. Particularly in the case of very wide material webs and subdivision into a corresponding number of material sub-webs M1 to Mn, an alternating arrangement takes place in the width direction, so that after subdivision, the individual webs can be completely wound on a single support roller 3 in a simple manner.

Hereinafter, the structure for a winding station 4a will be explained. By analogy, the statements also apply to the winding station 4b. The individual winding station 4a comprises at least one support and / or storage device 8a for the winding roll 6a. The winding roller 6a forms with the support roller 3 a winding nip 9a. This is variable by the position of the winding roller 6a relative to the support roller 3 with respect to the force acting in the winding nip 9a. According to FIG. 1b are the individual winding roller, illustrated here on the example of the winding roller 6a, viewed on both sides of their end portions in the width direction via support elements 10.1, 10.2 stored. The support elements 10.1, 10.2 are transversely to the material web running direction, that is guided displaceably parallel to the bearing axis L _{3 of} the support roller ₃ , preferably movable. At least in each case one in the winding tube 7a einbringbarer guide or clamping head 11.1, 11.2 rotatably mounted. The guide heads 11.1 and 11.2 are able to bear the weight of the winding roller 6a during winding completely or partially. About the support and / or bearing device 8a, the guide or clamping heads 11.1 and 11.2 are mounted in their position in the radial direction about the circumference of the support roller 3 slidably, also rotatable about its own axis. The guide heads 11.1, 11.2 carry while winding the total weight of the bobbins 6a and 6b. These are pressed by a here not shown in detail adjusting device of the guide heads 11.1, 11.2 when winding with the necessary for the desired winding quality contact pressure against the support roller 3 and rotated by this. The force in the winding nip 9a between the winding roller 6a and the support roller 3 thus also includes a component from the weight of the winding roller 6a. About the guide heads 11.1, 11.2, the winding tube 7a is fixed in position and centered. The winding tube 7a is inventively formed as a sleeve-like structure with a perforation 12. In the simplest case, this comprises at least two passage openings 14.1 to 14.n extending in the radial direction through the sleeve wall 13. The enclosed by the sleeve wall 13 interior 27 of the winding tube 7a is provided with a Means 15 for generating or for applying a vacuum in the interior 27 and thus coupled to evacuate the interior 27. The device is designated 15a for the winding station 4a, 15b for 4b. The coupling 16 takes place via the guide head 11.1, preferably also via both guide heads 11.1 and 11.2, as in FIG FIG. 3 shown. For this purpose, the guide-relationship manner clamping head 11.1, at least with its projecting into the winding tube 7a area 17.1 extending through the guide head 11.1 connecting line 28.1, which is connected to the device 15a, which is arranged externally.

The solution according to the invention allows without major modifications to the winding tube 7a and the support elements 10.1 evacuation of the sleeve interior 27 for the purpose of suction of the material web M or the respective partial web M1, M2 at the beginning of the winding process to the outer periphery 18 of the winding tube 7a.

In order to be able to carry out an effective evacuation, it is necessary to guide the winding sleeves 7a or 7b pressure-tight on the guide heads 11.1 and 11.2. For this purpose, the support and / or bearing device 8a, 8b furthermore each sealing means 19.1, 19.2, which at least each comprise a guide between head 11.1 or 11.2 and winding tube 7a can be arranged sealing element 20.1, 20.2.

The FIG. 2 illustrates in schematic simplified representation of a detail according to the FIG. 1 b. Visible here is the guide head 11.1 and a part of the winding tube 7a in an axial section. The sleeve wall 13 is here characterized by passage openings 14.1 and 14.2 or 14.3 and 14.4, which extend in the radial direction from the inner circumference 22 of the winding tube 7a to the outer periphery 18 and thus a connection between the enclosed by the sleeve wall 13 interior 27 and the outer surface or the outer periphery 18 allow the winding tube 7a. The rotationally fixed coupling between the winding tube 7a and the guide heads, here by way of example Guide head 11.1, is preferably realized by bracing, which is preferably carried out by the positioning and arrangement of Führungsbeziehungsweise clamping heads 11.1, 11.2 relative to the winding tube 7a. The bracing is done in this case, virtually in the axial direction, that is transverse to the material web passage direction. It is also conceivable to configure the outer and inner circumference of the guide head 11.1 and the winding sleeve 7a such that they form an interference fit with one another.

For pressure medium-tight design, the sealing means 19.1 and 19.2 are provided, which are preferably designed as contacting seals. These preferably each comprise at least one sealing element 20.1, 20.2, which are preferably fixed to perpendicular to the clamping direction sealing surfaces of the connecting elements winding tube 7a and guide head 11.1. This can be done by an axial or radial seal depending on the nature of the selected bracing. In the case shown, according to a particularly advantageous embodiment when realizing the rotationally fixed coupling between the winding tube 7a and guide head 11.1 by clamping transversely to the material web running direction, the sealing means 19.1 are preferably formed as axial seals. These are based on the guide head 11.1 and the winding tube 7a. The sealing surfaces are formed by a transverse to the longitudinal axis of the sleeve L ₇ , preferably perpendicular to this aligned surface area 23 on the guide head 11.1 and the end faces, here the end face 24, the winding tube 7a. The seal is a touching seal. As a sealing element, a sealing ring 25 or a combination of a plurality of sealing rings is preferably used in series or parallel connection. For evacuation of the interior 27, a coupling 16 is provided with a device 15 for generating / applying vacuum in the interior 27 or a negative pressure. The coupling 16 via the guide head 11.1, preferably in the form of a rotary feedthrough.

The FIGS. 1 and 2 illustrate the provision of a device for generating and applying a vacuum 15a only on one of the arranged on both sides Guide heads 11.1 or 11.2 on the sleeve 7a. However, it is also conceivable to apply the application of a vacuum on both sides. This is exemplified by a representation according to FIG. 1b in the FIG. 3 played. In this embodiment, means 15a2 on the other side are also provided.

In a particularly advantageous embodiment, a vacuum of 0.2 to 0.7 bar, preferably from 0.2 to 0.6 bar, is applied to the inner space 27. The number of through holes describing the perforation 12 is> 1. According to a particularly advantageous embodiment, through holes 14.1 to 14.n are provided at uniform intervals distributed on the outer circumference. The diameter d is in the range between 0.5 to 2 mm. According to an advantageous further development, the cross section of the passage openings 14.1 to 14.n is not constant in the radial direction. According to the execution in FIG. 2 is preferably in the radially outer region, that is provided in the region of the outer periphery 18 of the winding tube 7a a chamfer F, which has a diameter in the range between 1.1 to 3 xd, that is, the diameter of the through hole. The chamfer angle is in the range of 60 to 120 degrees, preferably 80 to 110 degrees.

The FIG. 4a illustrates an example of an arrangement of through holes 14.1 to 14.n distributed at equal intervals a in the width direction over the extension of the sleeve 7a. According to an advantageous further development, it is further provided to arrange the individual passage openings 14.1 to 14.n also in the circumferential direction, preferably at uniform intervals b from one another. In contrast, illustrates the FIG. 4b an arrangement with unevenly spaced passage openings.

LIST OF REFERENCE NUMBERS

1

winder

2

Backup roll winder

3

supporting roll

4a

winding station

4b

winding station

5

Slitter

6a

reel

6b

reel

7a

mandrel

7b

mandrel

8a

Support and / or storage facility

8b

Support and / or storage facility

9a

winding gap

10.1

supporting member

10.2

supporting member

11.1

Guide or clamping head

11.2

Guide or clamping head

12

perforation

13

sleeve wall

14.1 to 14.n

Through opening

15, 15a, 15b, 15a2

Device for generating and / or applying a vacuum

16

coupling

17.1

Area

18

outer periphery

19.1

sealing device

19.2

sealing device

20.1

sealing element

20.2

sealing element

22

Inner circumference of the winding tube

23

area

25

seal

24

front

27

inner space

28.1

connecting line

a

distance

d

diameter

F

chamfer

L ₃

Bearing axis of the support roller

L ₇

Winding bearing axis of the winding tube

M, M1 to Mn

web

Claims (15)

1. Winding device (1) for winding a material web, in particular a paper, board or tissue web, onto a core (7a), forming a wound reel (6a, 6b), having at least one winding station (4a, 4b) arranged on a central supporting roll (3), in each case comprising a carrying and/or supporting device (8a, 8b) for the wound reel (6a, 6b) with rotatably mounted guide heads (11.1, 11.2) that are arranged on both sides of the core (7a, 7b) and can be displaced transversely with respect to the material web running direction, i.e. parallel to the bearing axis (L₃) of the supporting roll (3), to engage in the core (7a, 7b),
   characterized in that
   the core (7a, 7b) has a perforation and the interior (14) enclosed by the core wall (13) is coupled via the guide head (11.1, 11.2) to a device (15) for applying a negative pressure, a sealing device (19.1, 19.2) being provided between the core (7a, 7b) and the respective guide head (11.1, 11.2).
2. Winding device (1) according to Claim 1,
   characterized in that
   the core (7a, 7b) can be clamped in the radial direction by the guide head (11.1, 11.2).
3. Winding device (1) according to Claim 1 or 2,
   characterized in that
   the core (7a, 7b) can be clamped in the axial direction by the guide head (11.1, 11.2).
4. Winding device (1) according to one of Claims 1 to 3,
   characterized in that
   the sealing device (19.1, 19.2) comprises sealing elements (20.1, 20.2) which are arranged between the core (7a, 7b) and the guide head (11.1, 11.2) in the direction of action of the clamping force.
5. Winding device (1) according to Claim 4,
   characterized in that
   the sealing device (19.1, 19.2) comprises at least one radial seal or axial seal.
6. Winding device (1) according to Claim 4 or 5,
   characterized in that
   the mutually facing surface regions of core (7a, 7b) and guide head (11.1, 11.2) form sealing surfaces.
7. Winding device (1) according to Claim 6,
   characterized in that
   the mutually facing surface regions of the end (24, 23) of the core (7a, 7b) and on the guide head (11.1, 11.2) form sealing surfaces.
8. Winding device (1) according to one of Claims 4 to 7,
   characterized in that
   the sealing device (19.1, 19.2) comprises at least one sealing element (20.1, 20.2), in particular in the form of a sealing ring (25).
9. Winding device (1) according to one of Claims 1 to 8,
   characterized in that
   the individual guide heads (11.1, 11.2) on both sides of the core (7a, 7b) are each assigned a device (15a, 15b, 15b2) for producing a negative pressure.
10. Winding device (1) according to one of Claims 1 to 9,
    characterized in that
    the core (7a, 7b) has at least two passage openings (14.1 - 14.n), preferably a plurality thereof, extending through the core wall (13).
11. Winding device (1) according to Claim 10,
    characterized in that
    a plurality of passage openings (14.1 - 14.n) are arranged at a distance from one another in the width direction and/or in the circumferential direction.
12. Winding device (1) according to Claim 11,
    characterized in that
    the individual passage openings (14.1 - 14.n) are arranged distributed uniformly over the circumference of the core (7a, 7b).
13. Winding device (1) according to one of Claims 10 to 12,
    characterized in that
    the passage openings in the direction of the extent in the radial direction in relation to the longitudinal axis (L7) of the core (7a, 7b) are characterized by a variable cross section.
14. Winding device (1) according to either of Claims 10 or 11,
    characterized in that
    the individual passage opening (14.1 - 14.n) in the region of the outer circumference (18) of the core (7a, 7b) is characterized by a larger cross-sectional area than in the region of the inner circumference, the greater cross-sectional area preferably being formed by a chamfer (F) with a chamfer angle in the range from 60 to 120 degrees, preferably from 80 to 110 degrees.
15. Winding device (1) according to one of Claims 1 to 14,
    characterized in that
    the device for acting on the interior (13) of the core (7a, 7b) is suitable for producing a vacuum in the range from 0.2 to 0.7 bar, preferably from 0.2 to 0.6 bar.

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